XML 45 R28.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Description Of Business (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Description Of Business [Abstract] |
Financing Receivable Credit Quality Indicators [Table Text Block] | The following table shows the percentage of Consumer Loans assigned to us with either FICO® scores below 650 or no FICO® scores:
|  | For the Years Ended December 31,
Consumer Loan Assignment Volume |  | 2024 |  | 2023 |  | 2022
Percentage of total unit volume with either FICO® scores below 650 or no FICO® scores |  | 80.6 | % |  | 80.9 | % |  | 84.8 | %
Schedule Of Percentage Of Consumer Loans Assigned Based On Unit and Dollar Volumes | The following table shows the percentage of Consumer Loans assigned to us as Dealer Loans and Purchased Loans for each of the last three years:
|  | Unit Volume |  | Dollar Volume (1)
For the Years Ended December 31, |  | Dealer Loans |  | Purchased Loans |  | Dealer Loans |  | Purchased Loans
2022 |  | 73.5 | % |  | 26.5 | % |  | 69.8 | % |  | 30.2 | %
2023 |  | 74.0 | % |  | 26.0 | % |  | 70.7 | % |  | 29.3 | %
2024 |  | 78.7 | % |  | 21.3 | % |  | 77.5 | % |  | 22.5 | %
(1)Represents advances paid to Dealers on Consumer Loans assigned under the Portfolio Program and one-time payments made to Dealers to purchase Consumer Loans assigned under the Purchase Program. Payments of Dealer Holdback (as defined below) and accelerated Dealer Holdback are not included.

X
- Definition Description Of Business [Abstract] + References No definition available. + Details
Name: | cacc_DescriptionOfBusinessAbstract
Namespace Prefix: | cacc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Percentage Of Consumer Loans Assigned Based On Unit Volumes Table Text Block + References No definition available. + Details
Name: | cacc_ScheduleOfPercentageOfConsumerLoansAssignedBasedOnUnitVolumesTableTextBlock
Namespace Prefix: | cacc_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 29 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-29 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration